diff --git a/ruma-identifiers/Cargo.toml b/ruma-identifiers/Cargo.toml
index e4e7e7b8..0d2cac36 100644
--- a/ruma-identifiers/Cargo.toml
+++ b/ruma-identifiers/Cargo.toml
@@ -28,6 +28,7 @@ either = { version = "1.5.3", optional = true }
 rand = { version = "0.7.3", optional = true }
 ruma-identifiers-macros = { version = "=0.17.4", path = "../ruma-identifiers-macros" }
 ruma-identifiers-validation = { version = "0.1.1", path = "../ruma-identifiers-validation", default-features = false }
+# Renamed so we can have a serde feature.
 serde1 = { package = "serde", version = "1.0.114", optional = true, features = ["derive"] }
 strum = { version = "0.19.2", features = ["derive"] }
 
diff --git a/ruma-identifiers/src/device_id.rs b/ruma-identifiers/src/device_id.rs
index 6b48965d..5ad72d1c 100644
--- a/ruma-identifiers/src/device_id.rs
+++ b/ruma-identifiers/src/device_id.rs
@@ -14,7 +14,7 @@ use crate::generate_localpart;
 /// simply for its semantic value.
 #[repr(transparent)]
 #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
-#[cfg_attr(feature = "serde", derive(serde1::Serialize), serde(transparent, crate = "serde1"))]
+#[cfg_attr(feature = "serde", derive(serde::Serialize), serde(transparent, crate = "serde"))]
 pub struct DeviceId(str);
 
 /// An owned device identifier.
@@ -115,10 +115,10 @@ impl Display for DeviceId {
 }
 
 #[cfg(feature = "serde")]
-impl<'de> serde1::Deserialize<'de> for Box<DeviceId> {
+impl<'de> serde::Deserialize<'de> for Box<DeviceId> {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
-        D: serde1::Deserializer<'de>,
+        D: serde::Deserializer<'de>,
     {
         crate::deserialize_id(deserializer, "An IP address or hostname")
     }
diff --git a/ruma-identifiers/src/lib.rs b/ruma-identifiers/src/lib.rs
index 3c54b3b0..d72cf903 100644
--- a/ruma-identifiers/src/lib.rs
+++ b/ruma-identifiers/src/lib.rs
@@ -9,10 +9,15 @@
 )]
 #![cfg_attr(docsrs, feature(doc_cfg))]
 
+// Renamed in `Cargo.toml` so we can have a serde feature.
+// Rename it back here because `serde1` is ugly.
+#[cfg(feature = "serde")]
+extern crate serde1 as serde;
+
 use std::convert::TryFrom;
 
 #[cfg(feature = "serde")]
-use serde1::de::{self, Deserialize as _, Deserializer, Unexpected};
+use serde::de::{self, Deserialize as _, Deserializer, Unexpected};
 
 #[doc(inline)]
 pub use crate::{
diff --git a/ruma-identifiers/src/macros.rs b/ruma-identifiers/src/macros.rs
index fa9ed6b4..e3cf036d 100644
--- a/ruma-identifiers/src/macros.rs
+++ b/ruma-identifiers/src/macros.rs
@@ -110,21 +110,21 @@ macro_rules! common_impls {
             }
         }
 
-        #[cfg(feature = "serde1")]
-        impl ::serde1::Serialize for $id {
+        #[cfg(feature = "serde")]
+        impl ::serde::Serialize for $id {
             fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
             where
-                S: ::serde1::Serializer,
+                S: ::serde::Serializer,
             {
                 serializer.serialize_str(self.as_str())
             }
         }
 
-        #[cfg(feature = "serde1")]
-        impl<'de> ::serde1::Deserialize<'de> for $id {
+        #[cfg(feature = "serde")]
+        impl<'de> ::serde::Deserialize<'de> for $id {
             fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
             where
-                D: ::serde1::Deserializer<'de>,
+                D: ::serde::Deserializer<'de>,
             {
                 crate::deserialize_id(deserializer, $desc)
             }
diff --git a/ruma-identifiers/src/room_version_id.rs b/ruma-identifiers/src/room_version_id.rs
index e1c1723b..d468f0d7 100644
--- a/ruma-identifiers/src/room_version_id.rs
+++ b/ruma-identifiers/src/room_version_id.rs
@@ -8,7 +8,7 @@ use std::{
 };
 
 #[cfg(feature = "serde")]
-use serde1::{Deserialize, Deserializer, Serialize, Serializer};
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
 
 use crate::Error;
 
diff --git a/ruma-identifiers/src/server_name.rs b/ruma-identifiers/src/server_name.rs
index d52b8838..ea7f7143 100644
--- a/ruma-identifiers/src/server_name.rs
+++ b/ruma-identifiers/src/server_name.rs
@@ -14,7 +14,7 @@ use crate::Error;
 /// A Matrix-spec compliant server name.
 #[repr(transparent)]
 #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
-#[cfg_attr(feature = "serde", derive(serde1::Serialize), serde(transparent, crate = "serde1"))]
+#[cfg_attr(feature = "serde", derive(serde::Serialize), serde(transparent, crate = "serde"))]
 pub struct ServerName(str);
 
 /// An owned server name.
@@ -131,10 +131,10 @@ impl Display for ServerName {
 }
 
 #[cfg(feature = "serde")]
-impl<'de> serde1::Deserialize<'de> for Box<ServerName> {
+impl<'de> serde::Deserialize<'de> for Box<ServerName> {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
     where
-        D: serde1::Deserializer<'de>,
+        D: serde::Deserializer<'de>,
     {
         crate::deserialize_id(deserializer, "An IP address or hostname")
     }